EVOLUTION OF THE MAGNETIC COMPONENT IN YANG–MILLS CONDENSATE DARK ENERGY MODELS

摘要

The evolution of the electric and magnetic components in an effective Yang–Mills condensate dark energy model is investigated. If the electric field is dominant, the magnetic component disappears with the expansion of the Universe. The total YM condensate tracks the radiation in the earlier Universe, and later it becomes wy ~ -1 and is thus similar to the cosmological constant. So the cosmic coincidence problem can be avoided in this model. However, if the magnetic field is dominant, wy > 1/3 holds for all time, suggesting that it cannot be a candidate for the dark energy in this case.